What does the name Dewey mean? The meaning of the name Dewey is Beloved. The origin of the name Dewey is Welsh. This is the culture in which the name originated, or in the case of a word, the language.
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Name Notes: An Anglocized version of the Welsh name Dewi and a form of the name David. "Dewey Decimal System" is a system to organize books in a library, invented by Melvil Dewey in 1876.